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astFreeDouble - Free previously double allocated memory

Description:
This function frees memory that has previouly been dynamically allocated using one of the AST memory function. It assumes that the supplied pointer is a pointer to an array of pointers. Each of these pointers is first freed, and then the supplied pointer is freed.
Synopsis:
void $*$astFreeDouble( void $*$ptr )
Parameters:
ptr
Pointer to previously allocated memory. An error will result if the memory has not previously been allocated by another function in this module. However, a NULL pointer value is accepted (without error) as indicating that no memory has yet been allocated, so that no action is required.
Returned Value:
astFreeDouble()
Always returns a NULL pointer.


next up previous 264
Next: astGrow - Allocate memory for an adjustable array
Up: AST Memory Management and Utility Functions
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council